Benjamin f



NITED STATES PATENT OFFICE. i 'i' BENJAMIN F. P'ATCH, on DANVERS, MASSACHUSETTS, AssIeNon To4 WILLIAM M. Comuna or SAME PLACE.

BURNISHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 377,574, dated February 7, 1888.

Application filed July 28, 1887. Serial No. 245,575. (No model.)

' To all whom, it may concern:

Be it known that I, BENJAMIN F. PATCH, a citizen of the United States, and a resident of Danvers, in the county `of Essex and State of Massachusetts, have invented new and useful Improvements in Burnishing Machines, of which the following, taken in connection with the accompanying drawings,is a specification.

This invention relates to'burnishing-machines for burnishing Shanks of boots or shoes, and is an improvement on the patent granted to me April 26, 1887, No. 362,036.

My present invention consists of an improved frictionheating device for heating the rotary burnishing-tool, and means for regulating the friction, and it is carried out as follows, reference being had to the accompanying drawings, wherein- Figure l represents a side elevation ofthe improved burnishingmachine, the friction heating device of which is shown in section. Fig. 2 represents a cross-section on the line A B, shown in Fig. 1.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

In the drawings, a represents a suitable post or standard, to which is secured or made in one piece the frame b, having bearings b and b in its upper end for the rotary drivingshaft c, provided with fast and loose pulleys c and c", as shown.

To the forward end of the shaft c is secured the bevel-gear c3, meshing into the teeth of the bevel-gear d,secured to the burnisher-shaftd, that is journaled in the bearing bsin the frame b, as shown. To the lower end of theburnisher-shaft d is secured the metal burnishing-disk D, having a concavity, D,'on its unvder side and a thin or rounded annularburnishing-edge, D, as shown.

The features above described are substantially like what are shown and described in my aforesaid Letters Patent,and form no part of my present invention, which consists in an improved friction heating device, and it is carried out as follows:

e is a bracket secured to frame b by means of screws e e', or similar devices, or cast or madein one piece with the frame b, as may be most convenient.

At e on the bracket e is pivoted the forked'Y portion thefrietion-blocks f f, preferably made of leather or analogous material, such blocks vbeing held in contact with the upper or lower portions of the burnishing-disk D, or both, as may be desired, with a proper pressure to obtain the desired heat of the said burnishing-tool. The forked piece f is provided with ears or extensions fv f, as shown in Fig. 1, upon which act the adjustable pressure-rods g g, said rods being loosely supported in bearings in the frame b, and lprovided with coiled or equivalent springs g g for forcing either or both of said rods against the rear of the ears ff on the pivoted friction heatingblock f, as may be'desired. The rear endsof the springs g. g' rest against the bottom of the recesses b* b4 in the frame b, and their for- Ward ends press against pins or shouldersg" g on the rods gg, as shown in Fig. 1. The rear ends of the rods g g project out through the rear portion of the frame b, and such rearwardly-projecting parts of the rods g g are screw-threaded and provided withthumbnuts, yor other suitable regulating-nuts, g3 g3, by means of which the pressure of the springs gg can be regulated. It will thus be seen that by adjusting the nuts g3 g3 the pressure lof the springs g g can be regulated so as tov cause the friction-blocks f f to bear against the upper or lower portion of the rotary b`ur nishing-disk D with any ldesired pressure, by which the frictional resistance is obtained to heat the burnishing-disk to the desired temperature during its rotation.

What I wish to secure by Letters Patent, and clai1n,is-

1. In combination with the rotary bur- .nishing-disk D, the forked friction-piece f and its blocks f f pivoted to the frame Z and provided with the adjustable presser-rods g g, as and for the 'purpose set forth.

2. In a burnishingmachine, the frictionpiece f and its blocks f f', pivoted to the frame b and provided wth ears or extensions to this speeieation,in the presence of two subf f in combination with the spring-pressed soribing witnesses, on this 25th day of May, rods g g, adapted to bear against the pivoted A. D. 1887.

friction-piece and having the pressure-regu- BENJAMIN F. PATCH. 5 lating nuts g3 g3, as and for the purpose set Witnesses:

forth. ALBAN ANDRN,

In testimony Wheeof I have signed my name CHARLES H. FOGG. 

